Fixes for Chrome clients of webclient.
Fixes for Chrome clients of webclient.

webclient.py now maintains a mapping of suid->single request as opposed to a mapp of
suid->list of requests. Since the evennia_webclient.js client only has one valid
request outstanding at all times, this should be safe.

TheTypoMaster/evennia,ergodicbreak/evennia,titeuf87/evennia,shollen/evennia,ypwalter/evennia,mrkulk/text-world,TheTypoMaster/evennia,ergodicbreak/evennia,mrkulk/text-world,jamesbeebop/evennia,ergodicbreak/evennia,shollen/evennia,feend78/evennia,feend78/evennia,emergebtc/evennia,titeuf87/evennia,mrkulk/text-world,emergebtc/evennia,feend78/evennia,ypwalter/evennia,jamesbeebop/evennia,jamesbeebop/evennia,titeuf87/evennia,ypwalter/evennia,titeuf87/evennia,mrkulk/text-world,TheTypoMaster/evennia,emergebtc/evennia,feend78/evennia